ALPAK - Subroutine package used by ALTRAN. "The ALPAK System for
Nonnumerical Algebra on a Digital Computer", W.S. Brown, Bell Sys Tech J
42:2081 (1963). Sammet 1969, p.502.
ALPAK Programming Language
http://www.programming-languages.co.uk/alpak.html
Large list of computer programming languages arranged alphabetically, with explanations.